* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Arial', sans-serif;
    background-color: #f9f9f9;
    color: #333;
  }
  
  button {
    cursor: pointer;
    border: none;
    outline: none;
  }